CHEN Yuping, JIANG Xin, LU Jiangang. Effects of reaction progress in microchannel on microstructure of Cu-Zn catalyst[J]. CIESC Journal, 2015, (10): 3895-3902.
CHEN Yuping, JIANG Xin, LU Jiangang. Effects of reaction progress in microchannel on microstructure of Cu-Zn catalyst[J]. CIESC Journal, 2015, (10): 3895-3902.DOI: 10.11949/j.issn.0438-1157.20150121.
The Cu/ZnO catalysts were prepared via microchannel reactor and characterized by TEM
XRD and XPS. It was difficult to find the individual CuO or ZnO region in HRTEM picture and XPS analysis indicated that the interaction between CuO and ZnO in microchannel samples was stronger than that in classical co-precipitation samples. The results of methanol synthesis from syngas in liquid manifested that the activity of microchannel catalysts was higher than that of classical co-precipitation catalysts. Comparing the precipitation in microchannel reactor with that of classical co-precipitation
it was found that the strong turbulent and tiny space resulted in a more uniform precipitation of Cu2+ and Zn2+
intensifying the dispersion and interaction between copper and zinc. In addition
the plug flow in the microchannel reactor made Cu2+ and Zn2+ undergo more uniform reaction course and form catalysts with more homogeneous structure. The research on tube length indicated that 30 s of the residence time was needed for the Cu-Zn precursors to reach the preliminary structural stability.